<PRE><B>Question 1066299</B>
So, we need to draw the maximum amount of money out of every denomination. And in this case, that answer is a maximum of 4.

So we draw out  

4 * $1 =  $4

3 * $2 =  $6 (because there are only 3 to draw out)

4 * $5 =  $20

4 * $20 = $80

1 * $50 = $50 (because there is only 1 to draw out)
----------------
$160

Now that we have drawn out the maximum amount, we need to actually activate the stopping condition. So we draw out the most amount of money we can of the bills remaining.

Bills remaining are $1, $5, and $20, so of course we will pick the $20.


$160 + $20 = $180   choice a.</PRE>